Jawaharlal Nehru Technological University Hyderabad
Jawaharlal Nehru Technological University Hyderabad B.Tech III METROLOGY AND MACHINE TOOLS Previous Question Paper (November/December - 2018 - R16)
Part A is compulsory (25 marks). Part B consists of 5 Units. Answer any one full question from each unit (10 marks each).
Part A
What are the different types of Chips
Answer
The three primary types of chips formed during metal cutting are continuous chips, discontinuous chips, and continuous chips with built-up edge (BUE).
How can tool rake angle and clearance angle defined?
Answer
The rake angle is the angle between the face of the tool and a plane perpendicular to the work surface at the cutting edge; it controls chip flow and cutting forces. The clearance angle is the angle between the flank of the tool and the machined surface of the workpiece, designed to prevent rubbing between the tool and the work.
Describe the Portable drilling machine and its applications.
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Discuss the characteristics of planer machined parts.
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What are the basic functions of milling?
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What are the applications of broaching machines?
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What are types of fits?
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Discuss about the Bevel protractor. Where it is used?
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Describe the importance of surface roughness?
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What is Coordinate measuring machine?
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Unit I
Describe the turning process in lathes.
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Explain the working of a multi spindle lathes and its applications.
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Differentiate between Capstan and Turret lathe.
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What are the different attachments used in lathe machine? Explain any two attachments?
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Unit II
Explain the working of radial drilling machine with a sketch.
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What are the different types of drill are used? Describe any one of the drill bits.
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Show and describe the various machining applications of slotting machines.
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Explain the working of planning machine with a sketch.
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Unit III
Describe briefly the method of estimation of the required for producing all the teeth of a spur gear in a gear hobbing machine.
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Explain the methods of indexing applicable in milling machine and its limitations.
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Explain the geometry of milling cutters with sketches.
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What are the types of abrasives? Explain any one of it.
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Unit IV
Explain the Taylor’s principle applied in limits.
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Explain the principle of optical flat and auto collimator.
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Describe the measuring method by using sine bar.
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Explain Hole basis system and shaft basis system.
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Unit V
What are the types and applications of CMM?
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Describe the screw thread measurement with sketch.
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Explain the machine tool alignment test on drilling machine.
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Explain the Roughness parameters and Roughness profiles.
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